package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealDishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class DishServiceImpl extends ServiceImpl<DishMapper,Dish> implements DishService {
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private SetmealDishService setmealDishService;
    /**
     * 根据id查询菜品信息和口味信息
     * @return
     */
    @Override
    public DishDto getByIdWithFlavor(Long id) {
        //查询菜品基本信息，从dish表查询
        Dish dish = this.getById(id);
        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto);
        //查询当前菜品对应的口味信息，从dish_flavor表查询
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dish.getId());
        //将查询得到的口味数据赋给dishDto
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(flavors);
        return dishDto;
    }
    //更新菜品信息，更新口味信息
    @Override
    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this.updateById(dishDto);
        //清理当前菜品对应口味数据--dish_flavor表的Delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());
        dishFlavorService.remove(queryWrapper);
        //添加当前提交过来的口味数据---dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors=flavors.stream().map((item)->{
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());
        dishFlavorService.saveBatch(flavors);
    }

    //新增菜品，同时插入菜品对应的口味数据，需要操作两张表：dish、dish_flavor
    @Override
    //多表控制，加入事务
    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品的基本信息到菜品表dish
        this.save(dishDto);
        //菜品id
        Long id = dishDto.getId();
        //菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors=flavors.stream().map((item)->{
        item.setDishId(id);
            return item;
        }).collect(Collectors.toList());
        //保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(flavors);
    }
    // 删除菜品
    @Override
    public void removeWithFlavor(List<Long> ids) {
        //查询菜品状态status，确定是否可以删除
        int count = this.count(Wrappers.<Dish>lambdaQuery().in(Dish::getId, ids).eq(Dish::getStatus, 1));
        if (count > 0) {
            throw new CustomException("菜品正在售卖中，无法删除");
        }
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(Dish::getId, ids);
        this.remove(queryWrapper);
        DishFlavor dishFlavor = new DishFlavor();
        dishFlavor.setIsDeleted(1);
        dishFlavorService.update(dishFlavor, Wrappers.<DishFlavor>lambdaQuery().in(DishFlavor::getDishId, ids));
        SetmealDish setMealDish = new SetmealDish();
        setMealDish.setIsDeleted(1);
        setmealDishService.update(setMealDish, Wrappers.<SetmealDish>lambdaQuery()
                .in(SetmealDish::getDishId, ids));
    }
    //停售，启售
    @Override
    public void stopSelling(List<Long> ids) {
        Dish dish = new Dish();
        dish.setStatus(0);
        this.update(dish, Wrappers.<Dish>lambdaQuery().in(Dish::getId, ids));
    }

    @Override
    public void selling(List<Long> ids) {
        Dish dish = new Dish();
        dish.setStatus(1);
        this.update(dish, Wrappers.<Dish>lambdaQuery().in(Dish::getId, ids));
    }
}
